Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a2b8177d04459e09c25c5ef93c9b369cc5599e3c68beae2de9b0b8058e825d5b' 
  AND token = 'rBTAXlmRyatqGbsJ4owAswXKAG5jFe30uIwDiY/0KhA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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