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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f8329d939cbdce21d1a06c29e1b4ba03388c941e92e0e3ba149eac1bd9d5b67d' 
  AND token = 'CPeA7dFvGomqQBVu+VGbxyPJbAXIKXC9ZGHi6uo1ZYw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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