Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5621e4ac864dc92430648d6ace132ad199e4f54e832894f008431f02894aae43' 
  AND token = 'McOD6kHo6P+UFC3Zsk3Oefpkjry//12yIw+DDzd+D7k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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