Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '784f6ba987bbbba672518c0eb5168452cfb1b9d1da55d2ba39518b175ea5063e' 
  AND token = 'Ho8DKKdl3noVy+VGM+f8Bkbct5ApZQdM1tkDTSj/1VQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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