Sandbox

SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'a3fd1b7d19ed01c18f4b01b56045847b73e1b6f52644ad10fd0260b3a202118c' 
  AND token = 'b5VxSTS+EGsb4QHxLnDQQXn9OmsBnJW6xhicQYl1Dcw=' 
  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"
    }
  }
}