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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3eee1a37444581cc4cd8d9c26ae7c78a99d4cabadb0558c7fc13b7ea31d0a149' 
  AND token = 'Y6SEfoML8HR49P2DFssvrj1iYju7hPUYUOK3sjJF/AI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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