Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6340dc050c9798cefc2206d0e79209f9c2def605222e65cba75f55b772af120f' 
  AND token = 'owWA3Opb5EmKDdpUu6ijDYiss6JVtCCT5LoWg7dA514=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00057

JSON explain

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