Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bbb57984fa9bfa7f69c5de34eedc8a037f861457fe349556adecb4cf7bed4a02' 
  AND token = '7iJpgn1eTqe0icUMySq7zhGACcNXf40c3DWaaX3P6kg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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