Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '85814ba223a917878a66734e11a541e0317e672c03fdd95b7a5be2fb7a729d3f' 
  AND token = 'dOW5ZpM+knhV6bsTPoGySEs2nsnS+evXocU56rb7pl8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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