Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7bd6ee5f5eefc3b973f1df3932c4a9714b2e90ece49cb635629c1b3f2da9856f' 
  AND token = '8mYgh5hr1LlmAo3t440SwGW3K1Cc1gpeNQ3fiietRV8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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