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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'abd727220f86e8fc504b1dad4eda94cb7ed0ac2c63d607790929f5fbe1e4482f' 
  AND token = 'kVOZI5jdu0hGH/iEItMhhH97ytK3xjLk4m3/T+fCVpE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}