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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'dce1b33349d5fd50e6d712cccb9cef0bb827173697517f9e1a7c3c126b00f11d' 
  AND token = 'b7WIav3aH+jqz9PE/9ZhAfwodOMbrTxjdNUKOfq4b4U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00011

JSON explain

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