Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f654be06de4bbd86956253fe4aee5436729f331f2cfe34915bb44e8fa32cd73d' 
  AND token = 'lDtTAZ7QsMZCNqBXkiuOH74BJy8EOfHMOvjgsu9cYmc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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