Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '17c6c2caa471b5ee7de9d874445b2e2761c92e9751fa0c49262251c6a5574622' 
  AND token = '8zaQKl5euDw/fQ3+4hTWkvP40oqPWSuERRXIKPlWHps=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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