Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e8369ad0cf32f89bef1927ae84b4772b79077cebf3016e62efb4da2560c2b9fd' 
  AND token = 'Tyg8AG3vLW9Heqwc5kXL8ars98Ybz2n+15s9KMW5D60=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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