Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '903d5e215e1d04926c78b25d7018187be25792cc92575313314d157c894ca86f' 
  AND token = 'dXXSYV5VgrO+pEOY3wrmoTiZ5Qwp8k6fauHEvNS/WCk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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