Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f0ebde3ba48e242fd4d850831d109ae92f6f40e84b61db46e10b1e1847fb2675' 
  AND token = 'OC14EaO6YTKVqMiAo1gFI6ymSQp+IguBNCD+UnM7dR0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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