Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c79a1b33cd32a78846f5bd45dbf515a9bb87d53ef6b2d7336ebe2d9fdcf2bf79' 
  AND token = 'ytD4WvRzXzo46TLlPJLakv9yz1M6hkMd3fwsSmHrG4I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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