Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e1c31f9b73a39a3dc7cfda5cdad43624ca1bd5f11d7d712e17221026b8d68e98' 
  AND token = '8GM/snLiN2UtK/o6L2TKcaMK/WcsqAVn0IyHmspWPyk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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