Sandbox

SELECT 
  1 
FROM 
  tmall_lock_keys 
WHERE 
  key_id = 'ea8dd34df247e11e13c16ac186b369d2ec2fa164f0ee9f2cf4824e12d5e86152' 
  AND token = 'EuKpZRch16bxT6QKLLLUma5k8RzYTJiSLGK7Dfpgv2c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00774

JSON explain

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