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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'cacb8b96779587399dafda0667b86ba61037b7f85e31b2fc74c9a98887e90aee' 
  AND token = '54PLAZuiX4Vh7KnkgOJMi7q6OAwWx5XrZQcBHsX9+3I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00007

JSON explain

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