Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '12c26a6b31a44f2693eeeb11669b7f23711c29643b829a1a92f374ee5ec9f9cc' 
  AND token = 'fv2kasz4duNGZqzeqobPgwQ4o5wr4Yf7q1NzxkRQ6+M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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