Sandbox

SELECT 
  1 
FROM 
  tmall_lock_keys 
WHERE 
  key_id = '432e2bc2cb9792ffa4b26cc4fe584bb5a1e7a5d6f44e426d0f2170e4e723fab6' 
  AND token = 'W9Q2U7Ojdk9pfjnkfx7E8Zcn8DawNlKV6Pe+smgg/6s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00753

JSON explain

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