Sandbox

SELECT 
  1 
FROM 
  tmall_lock_keys 
WHERE 
  key_id = 'eef9a0339d54a64d27f68754c052d461a1c34a716cc0805ed60107655c82729e' 
  AND token = 'Zyt2G+M9GQSFPvoNOV6mUVYA2sxYgVwiDoX4eK+K57A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00796

JSON explain

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