Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '79a4d3a9c79672ffa9f9f2160c8ad84e864e990db21a3cea0c077500208623a3' 
  AND token = 'dFCSNCfbRiNgixdLYzSPUK4Y2/+pCAmH7PqFwQgY07w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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