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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '862bfbd5d0c16d4f1b386b7b06d4a19f9eda4e5d9b50e2c331070e97af1e8294' 
  AND token = 'QyiHDwDXDF1cOXbfzsIbcZaUn5DBvpWy2W0vnGh+WPA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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