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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e33970624f1f069976f0332bfcd5ff4cfd92f81066e5bfd3d0aa3fd2f24312a9' 
  AND token = 'JuleiAKaQa+LFymscYPodOENA0TDpx5EOmQCDss6N04=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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