Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '48177474c390de25e0d7db07fc0b35a15dce808e3584501b396a2bc32903ecea' 
  AND token = 'kwlmN7N133R3zsIvW0BzpCSw+JRZIifspbtDO2xOHiM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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