Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '16a6c544a5efb9e067d1555c6c1033f76651e03536e93453bd8bf10d6d10b447' 
  AND token = 'KUOOhO1cqIAckCObOfU2aSzH0kOj235LKVufhcZAc4M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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