Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4a85a0aeda266b15ff1fa7f8c384d4729fc59f70e28bf8cbda8e04df188890e8' 
  AND token = 'N3aSWmVXiCIgeihhANGKk54FLv5tL8tuhB031KaM65g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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