SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '6770163a11381033379ffae35f300ef1e220b21e3ed4ea80b43284aa231f819a' 
  AND token = 'bWRGEUp2zsWs5g9LhcC76ZY/QuKMsTrB4VL6twGRoag=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00008

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}