Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '53518662dc69a907506a09b79b876798dde6a5f653ac6b1f9717dcd44fb3716e' 
  AND token = 'k9gwhoo+Wg490fKndJtty/KVPiJplLnBUM+7uFWBt7c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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