Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4fd0e7f4c97d294f6bed8868591008d2e3018f02011b6a8a487db557c450538e' 
  AND token = 'Z3AesoRgPBkMySahL4a5pHYcu9602md9gatEgNAy1Fs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00052

JSON explain

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