Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e6c95a0da6b027297f24c21fab400cf46dfef1d41b34ce4f229ea08e4258a611' 
  AND token = 't/uz8hI3vNalKYNWEEo0HrAjFBeAITWgI5JWrZCpWwM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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