Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '704f0a0ffa31e683791d772914dfad30fd5440ba2846a42ffb7326193dc7226e' 
  AND token = 'ldT4IqyQRKGtl38LqRqHVUfA2prm9Ppb2tJdosCI/Uk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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