Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cdc51fe69d652958a5e8b7898a8fa4b95e6342ce52fef6d6e1a0e169b54c3047' 
  AND token = 'VZntvi8reSc6Vfy7jNugnWLqYrZ5vZYuKN6x/hgHhm8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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