SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9723ed9011b112a8fb5f8f2d4b33b27345f9e92ea94495b75b70f6e0fc1ae165' 
  AND token = 'FA6eroQZNAZc0C7q9Dz/9h0vD4YJOGDwj6xPub/AswA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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