Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f1e8cd7c3e1ff19fa6812bb1b711287b48de94b84b0e3811868e543c4c3f526b' 
  AND token = 'Z/HRMhG6hwH4PvMl5RpsQHcuTl8fir8VH5JaheGVSvQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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