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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '4caec1716ed765a8253dc55d0d6a7f32c13f173b21aa176bd4741ad98133491b' 
  AND token = 'Sik7bgLwpsQqmL9NTa6uUcfeYFzWxTY3sRLnnfmRiGc=' 
  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"
    }
  }
}