Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '892ffd8c9bb71c57d613ac330823d7dcca67795679961fef11d540558a2ea0a1' 
  AND token = 'xkHAiIm1xLYSl7jUUqpbsVVfO/UBsl0aoXl6aDptJvI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00074

JSON explain

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