Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e958c1aad523631c06e7aa05216bb595c9ad4b09ab5b30fc78caa2a68e24b010' 
  AND token = 'BN5GPSRnKMclG+G6R4PCKypd8NgCM2+mkfAsBKjyUQE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

JSON explain

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