Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '36f313c8255fbdcaffbab7c36d482ecef124e4ae53f981e3d80fd2ad89719d7c' 
  AND token = 'VGSDkydzXqwiuBLer8aDApNqPhfTgYbdLfFm+3uoBAU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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