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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '531333a8c68501ebbb5690a72730723ba6d9bfa844b6ccbaf8bf50bcd289ef9b' 
  AND token = 'IkolSrkuPvxbEEludeamOnGnoGK3kUdegoT2A5cvKhw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00010

JSON explain

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