Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '77dda9514aa99e3dba8eaba3ae4f03d6580b6f9278250b0345c2de43787b6a28' 
  AND token = 'oXTNOnv+jcztWydqvFLwSkvJc8e8MMVZJWgK4TLRrzE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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