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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c2d4ca046c018d8b54a4c0a2757f6a6a8d2b7317f2852cb07400515c27328e28' 
  AND token = 'nUbODQMxZxb9QjVxKGSZ9yMRTeaGJTx8Og2n/pcW0gg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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