SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '475b749069c237ead0f351ea98cff1b5da89b397cfc970d06860df4e956dbd61' 
  AND token = 'Q6RSgR4sFIZwXVIcsvKfNpXxQIqpLGJsHx/UIBRUxcg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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