Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ebaa350058b3d2f681083bd95f3d186e0fa38642825ea54bc6fc557a65890dac' 
  AND token = 'QV2me3PlWlMaHYARKN2mhqzXbMQPacTtGgscKx5vQjs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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