SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '01cde086b73b49619e3c51ca7a6d520bce143a9779bcddb5d092bf32d0e47f7e' 
  AND token = 'JYxZbtZmjjgQsdGtBnI+cO2upJU+tQ1cEnqvQKDIRKA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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