Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ffa12bd6dca68493a2d442edaf1c1766d72024817d58408bd489c6cad4cfdd36' 
  AND token = 'eaJQ5i56WZJEUC4doOKdTakdvZr97tCalrLJrU84XrU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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