Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '25ebdc6e534767a70402f0b947bc21f0e12f9ccc6aacdf3966811298d4c6f987' 
  AND token = 'xkeHHM+QX2pbSyq6VdIJXt+ZAbzye+eJBT6AVnjM+8c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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