Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '706f5f1975557c806d9c9bced349015987ff7e01a092e31ad0e199401801b1b3' 
  AND token = 'WRplo2BVN+JP7u0j2+6+ryqbBxKTL8w/z1HoRYJRk0I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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