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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '061b03c729c92be75e970bf840b3a05bbbd20f4c19ed8556a4062a672a3cb5c7' 
  AND token = 'HGyiv783zqhTbw5yI1qxdbZTLO/S0Yc0TegXTu8D1zU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}