Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e3055e8051c69cae9739237644ff6f205c189529a211d7ed36d6d814d1f7abc3' 
  AND token = 'w/G2Kd+q6GkCdIyMxA4HnMDcDaFE5mfJOM0QxfcvHmA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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