Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7f8f8271bc05996cb45cc6d4f45738919fbfd4c4c854fb524c485995b08c3d9c' 
  AND token = 'EvGALFxid5VF32Hvq0C78i/mg/rH0PjVTX0abYy2vwg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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