SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '85c49959c837b87ff690d86f5cca5ad7ccf2229e7593decd809d5a1379af626e' 
  AND token = 'eHRG3mX9HvYPmWjZ0hBHpEoCIyZIrwziNcILRpVPmE8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

JSON explain

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