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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '11d6dae2f574ccc82a418bd61a829246c302752b884bd426746e61f0e60fe017' 
  AND token = 'HMgQV/3u8bhCG5hCs5K8N7ZTRVlIfPtA5PsQHApha6M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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