Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'eab4c6c22f558fcbdbf89defe0bfd9b44e9e08faf25594d8e039830d7b7c7f98' 
  AND token = 'c6g4FE2sit6sVeyecloikxlj5da+8MFN9sIUFcxdt9c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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