Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e1a5e25754306a3d29a5a4695238e16d1e54c43df0ffd03c6526bb6a0134a191' 
  AND token = 'KsGPCftqsyYVawRVns+rDs1xMC0y8Ss7ncTWsn0bVlE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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