Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9e875a859c25972cc3727e3207ee5c0462e9b0b52eef242c5d5f7b490c5551b8' 
  AND token = 'bvhu5VbiLHN4KKabtireuyQTHam8FqDGZyOQ5NCeCnE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00013

JSON explain

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