Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2e08b37fac120d6c40b4676ad6227c80546479095462a9d8c519a68647c157d5' 
  AND token = 'kiMjXDmY+CbDbCQwPI1ITwAa+y7PtQg1g+O+iwwFxj4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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