Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4fa9abcc5e7ea31f6d01fe51e59a0701bafda492387efdeadee37869d20d1ef1' 
  AND token = 'SinKkdBTDKqAMfoEhUkKjFSTQ7lCwDbGz2VVZCvdFiQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00065

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}