Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f1630258f04c1abb7050bcc020bb3070cd3b3bd2c3f8df0fc97fc1145a80d6ab' 
  AND token = '2cIUhrxnqmEplihd4fK+wI6Mn7cBzmbyV3ssCRO3NAQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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