Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4dea79e9a89c7891d90aee61967f5d8b2a1772e41fe37b680984962eb5305308' 
  AND token = 'MeaBokSR66aOtB8ZWt7STLrXqsB20DJKn64EAmo2lP8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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