Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0212b4c508a5f31fed0cd6af3339e4d1544bd941da4320af26008496737eb303' 
  AND token = 'jopMkumqlPSrouiQcyGnIDLv2u/o5MYSDqjxnWu1ro8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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