Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '87b04669b838f053c5fd21cf4cdd876615c7ece6ab9668833e537dfacb8d33b3' 
  AND token = 'PsTdT/Ol/Nr++aJ8eG/5DamQefb/840BLCtT5a7LeTQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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