Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b124881cf8761a977c9071f6d1feea5fb4ebc64cb687cf05cf0e8929a65f2244' 
  AND token = 'zu6DG8PqAoMtwXrTxe0JIJkcofM8Sa5nptAOdyPJkU8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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