Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '44adc30298030a1ae9cb924b79ecf687ba8bfe9e9edfb0d1d8f4f8729c8509d6' 
  AND token = 'ULtyGOqJEenwQLqR2yXa66WRPg7L12QiqNHFzb2F2mI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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