Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2a59e239e5b999eb15efdddb859369ec8b586f26ffd4d2c6960cad456b45d183' 
  AND token = 'LWuYwyoPj75zWw5su/TUBReFwxuQPtVoxfTDFcYslD8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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