Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0b801cb93bca079c9b74037b54a80912e6a3f3ec4ae7e03e0008535aa7211c67' 
  AND token = 'EXjxjDEhhWGK7dF78DpUJ0a6++nlaK6Wrx3+/g0gBcY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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