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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b4132c31e5731d870268bc900546ad36a519162dbbb707b4b8239f5a41641eb1' 
  AND token = 'TVS0xOVpF2eIsyTiTvXXd1aeD5x/CIA1NjTkZs5xEJo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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