Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'aac5ffad8c0dfcf47b654433298cc24a9f75823384ded812ff0f02207485e825' 
  AND token = '/CNNOAWcZFUXB6zyakC18MbsK234jStKg7awQWmmqR8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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