Sandbox

SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '03aabba195e3ce53d28983ae916656964ea6e12d078ad43518f283b8eecb23c9' 
  AND token = 'xzw0jXPvkrakaEw+ZPSfJN81zze+RlweBWbn1YCKwO8=' 
  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"
    }
  }
}