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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9280c2d9325e2e8fdfc7694d1ab9217e2f09a851e23fc7f0ed176ee12d8674fe' 
  AND token = 'CBFku/FsWUAxj/aDwON8Es7uVR0k8D3uWlrS88c9Tzw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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