Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4f4af31810bca5e7e4b1ba8d753cd511951b5eb71b0b6df0f14f5a571505651c' 
  AND token = 'hHP/g3hmoGKPkZsYj9opyIeQ+Vo7fNOUibks1Uk0rBM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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