Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2b0ad3d962a44603f43e9d280da5ae87a19d7fc3372ea96eb09b2ec418113653' 
  AND token = 'QQ9r9RZg5TAxNS7TaMHzgxrDKtkr8DP0QMcVA2GzM7c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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