Sandbox

SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'ad1ec9fac57ced89511849b23a5cb690eb6513049f1132df370172ef33db495d' 
  AND token = 'exFrDgEDkS4tA412ZWEwtNrE8WNLLvtTar0EZcnZXI8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00009

JSON explain

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