Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f7c9a06b8493bb7ec83b0563ffea4f511f7d4f6f6f97fb74a98a6190e8a8d5d0' 
  AND token = 'wsNkUCqx1gGk5Te+xl96JS58j3JuRHFYoWOSfPUo+xw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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