Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '95a2c16b74607e7243268df723275f217f41ea36812556a77d973d0f3da53944' 
  AND token = '0lOqitQSghMe5GcMM8cBQQBXkQAEPFMcKYERipkU3rA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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