SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dfd305f9ba073d18a56075fd45fa748ea98db9d85e53799b7cb545ae80e0c005' 
  AND token = 'TV+Ow8AK62VKlAqgnn3UbwHzuf2bju/N4Uc2CMdDua8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00069

JSON explain

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