Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '44ae94f12bef4f4427a00ce7b7233c70e4583b1237d1cb489c21cac685bdf2aa' 
  AND token = 'EIp653rmOmcWQVTXy5r9Dml8VnYrc0vFjK/nMsbpJS0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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