Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7011f8f01ff416c71430754243e5e58eb261b13135820677df2db9fe32c9b6a4' 
  AND token = '3llcHLg0d1B1g6drsGW8bLOgwLxLJkrCqRLcTTluIOY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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