SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1ae72d4b7b8ef992128f0089585b614f4506a31e9b6fd4a73d0eeb85d288db8d' 
  AND token = 'A+pgO9qMPXjyQlWMKtvvw+nhEzpi+Wxaxe2GHkJ8LRo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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