Sandbox

SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '5de56654d339a79b7acbcd71f6ccfcdb81c4d955da3a5c5f14fc707e4d5ec9ce' 
  AND token = 'jynG9dUNGDwwV5eOpMFfhP6TrP7YphNiNdDOpP6VLK4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00012

JSON explain

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