Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '349070003a2ee15d47ec2d4fba65d7cba185c3231e5b721006c2534e386ba13d' 
  AND token = '13Gfr1FT1LooELr1lqK9Ej1pyCACXTV5+r8j366XVXA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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