Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1e483da0d5adaf81d614682310d9492c50f8e8da2edae7316544dbe35c9b11d0' 
  AND token = 'ekh1j+4nMUivT9fZ/WJ6D1E9o6ciytLq1t2dm1ydWlw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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