Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0ab780e5d2f992e400ff49537df3c9ab1d99ecc4baf1fe082af97c91b89d7485' 
  AND token = 'DXt4QPKsJJeQ+K868hHInI6tG9dUjHHPMjC07rKAh50=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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