Sandbox

SELECT 
  1 
FROM 
  tmall_lock_keys 
WHERE 
  key_id = '5f1910edd75b21ec8b4a4af3a8068ab264d6e5837a6b82b944125a0a542bb9fd' 
  AND token = 'zqcvS4v37DVIh/apIARD2V1tYrYTsgsmJIig08ND0EM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00866

JSON explain

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